Hi Per,
Thank you for evaluating Syncfusion products.
We are afraid that we are unable to reproduce the issue reported by you. We have tried the sample attached by you and it works fine in our end. We are able to upload and insert images in the Uploaded_Images folder. I have also recorded a video to demonstrate this working sample.
Kindly download the video from the following link and refer it,
RTE1737315563.zipIf the issue exists still, could you please provide some more details to reproduce this issue so that we could analyze more on this and find out the causes of this issue.
Regards,
Varalakshmi.R.S